Have you heard back from Akamai? I have been thinking that i want to start a peering exchange in our regional city for 4 isp's that are here with about 5,000 subscribers. Am thinking if i started a peering exchange, it would encourage our national carriers (who major content providers use) would want to peer as well so we can try and get some free bandwidth.
We have a national fibre carrier that peers at all the internet exchanges around the country because they advertise to content carriers (like our equivalant of hulu/ondemand, news and video websites) that they can deliver their content to users faster. They just need a reason to connect to me and if i happened to be 4 isp's at an internet exchange then they would be keen.
A shared akamai cache at the exchange would be good for us too as it would encourage the 3 other local isp's to connect to the exchange - so i am keen to find out what akamai say their requirements are.